Abstract: Ebullated bed hydrogenation technology was adopted to solve the difficulty in hydrogenation of oil from coal direct liquefaction because of its high content of resin and asphaltene and solid impurities. The industrial results showed that the qualities of hydrogenation stabilized oil meets the design requirements, even though the actual raw material was significant heavier than the design one. The sulfur and nitrogen contents of heavy oil from coal direct liquefaction were greatly reduced, and the effect of resin removal was obvious. The aromatic carbon ratio decreased from 55.86% to 38.30%, a decrease of 17.56 percentage points, which conforms the design requirements for the aromatics saturation depth of the device. The practice results also prove that the domestic catalyst shows the better performance than the imported catalyst in activity and long-run stability and that the ebullated bed hydrogenation technology can solve the problem in hydrogenation of oil from coal direct liquefaction .

Key words: coal liquefaction, hydrogenation, hydrogen donor, ebullated bed, hydrogenation stabilization